If you look back at your original post with this topic, you will see that I have answered with this statement. " As long as your floor braces remained, or you replaced the floor braces, the nuts that the seat belt bolts screw into are actually located in the middle floor brace. Go under the car and drill up into the floorboards, no measuring required. The inboard tunnel mounts require you take out your driveshaft to get at those. Just start with a smaller bit than the hole in question, drill through, then go up top into the passenger compartment and use a wood boring type bit (top that looks like a pitchfork) to cut a perfect hole from the pass. compartment to the center brace. This way you wont damage the threads. Case closed. good luck Jason.mahoney310 said: